Commands using echo sorted by votes

Commands using echo (1,545)

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Count messages in mcabber history for each JID
This is sample output - yours may be different.
-1

for f in ~/.mcabber/histo/*; do a=`egrep "^(MR|MS)" $f | wc -l`; echo $f: $a | awk -F\/ '{print $6}'; done

aluminiumgeek · 2011-06-04 10:51:49 3
which domain controller the user currently logged onto

The command line can be accessed by using the cmd command which will open a command window with a DOS interface. The command line is a throw back to the early days of computing before there was a Windows interface. Show Sample Output
This is sample output - yours may be different.
```
\\cicciobombadc
```
-1

echo %logonserver%

0disse0 · 2011-06-13 09:52:51 6
Lookaround in grep

tutorial @ http://www.regular-expressions.info/lookaround.html also see @ http://stackoverflow.com/questions/5080988/how-to-extract-string-following-a-pattern-with-grep-regex-or-perl for tip: `grep -Po 'name="\K.*?(?=")' file.txt` Show Sample Output
This is sample output - yours may be different.
```
$ John
```
-1

echo "John's" | grep -Po '\b\w+(?<!s)\b'

evandrix · 2011-07-15 12:08:18 6
Echo exit status (a.k.a. return code)

I often find it useful to know what the exit status for a program was. This can be helpful when looking up errors by exit status or when scripting frequent commands. Taken from http://www.faqs.org/docs/abs/HTML/exit-status.html Show Sample Output
This is sample output - yours may be different.
```
echo hello
echo $?    # Exit status 0 returned because command executed successfully.
0
ls foo
echo $?    # Exit status 2 returned because command failed (value depends on command, see man page).
2
```
-1

echo $?

lucasrangit · 2011-07-27 15:34:20 3
Time redis ping in thousands of a second.

Outputs the real time it takes a Redis ping to run in thousands of a second without any proceeding 0's. Useful for logging or scripted action.
This is sample output - yours may be different.
-1

TIME=$( { time redis-cli PING; } 2>&1 ) ; echo $TIME | awk '{print $3}' | sed 's/0m//; s/\.//; s/s//; s/^0.[^[1-9]*//g;'

allrightname · 2011-08-11 19:09:49 4
creates a xkcd #936-style password
This is sample output - yours may be different.
-1

RANGE=`wc -l /usr/share/dict/words | sed 's/^$[0-9]*$ .*$/\1/'`; for i in {1..4}; do let "N = $RANDOM % $RANGE"; sed -n -e "${N}p" /usr/share/dict/words | tr -d '\n'; done; RANGE=100; let "N = $RANDOM % $RANGE"; echo $N

unixmonkey24597 · 2011-08-16 07:04:57 3
Alternative for basename using grep to extract file name

fileName /path/to/file.ext quivalent to basename /path/to/file.ext Show Sample Output
This is sample output - yours may be different.
```
$ fileName /path/to/file.ext
file.ext
$ 
```
-1

fileName() { echo "$1" | grep -o "[^/]*$"; }

totti · 2011-08-19 18:16:22 3
Use socat to wrap around your pty to enter the password.

You should really use keys. Really. I'm serious. But if you have to add your key, change password etc. for a long list of servers, this might help.
This is sample output - yours may be different.
-1

(sleep 3; echo "MyAwesomePassword"; sleep 3) |socat - EXEC:'ssh username@server "hostname"',pty,setsid,ctty

TommyBotten · 2011-08-24 14:13:18 4
ping scan for a network and says who is alive or not
This is sample output - yours may be different.
-1

for i in `seq 254`;do ping -c 1 192.168.10.$i > /dev/null && echo "$i is up"||echo "$i is down";done

hackuracy · 2011-08-26 11:09:43 3
Hunt for the newest file.
This is sample output - yours may be different.
-1

find . -printf "%T@ %p\n" | sed -e 1d | while read ts fn; do ts=${ts%.*}; if [ $ts -ge ${gts:-0} ]; then gts=$ts; echo `date -d @$gts` $fn; fi; done

bandie91 · 2011-09-13 08:00:27 4
Create nthash
This is sample output - yours may be different.
-1

echo -n "password" | iconv -t utf-16le | openssl dgst -md4

damncool · 2011-09-22 16:29:41 3
Command line calculator

This is an "argument calculator" funktion. The precision is set to 4 and you can use dot (.) or comma (,) as decimal mark (which is great for german users with a comma on the numpad).
This is sample output - yours may be different.
-1

calc() { echo "scale=4; ${*//,/.}" | bc -l; }

fpunktk · 2011-10-24 19:58:20 4
measure answer time of a web service

This uses curl to find out the access times of a web service Show Sample Output
This is sample output - yours may be different.
```
1. 13:54:15: real 0m0.393s
2. 13:54:21: real 0m0.053s
3. 13:54:28: real 0m0.678s
4. 13:54:34: real 0m0.166s
....
40. ...
```
-1

for i in {1..40};do echo -n $i. $(date +%H:%M:%S):\ ; (time curl 'http://ya.ru/' &> /dev/null) 2>&1|grep real;sleep 1;done

AntonyC · 2011-11-11 10:40:38 3
Terminate script or shell if not launched as root

This example code is intended to be used as a root permissions check in a script. It makes use of the $EUID (effective user ID) environment variable which is fully su- and sudo-safe.
This is sample output - yours may be different.
-1

if [[ $EUID -ne 0 ]]; then echo 'Root permissions required! Exiting.'; exit; fi

lordtoran · 2011-11-19 23:06:52 8
Mini-framework: just paste and execute!

Schematics: command [options] [paste your variable here] parameter command [options] [paste entire column of variables here] parameter ... (hard-code command "c" and parameter "e" according to your wishes: in example shown command = "cp -a" and parameter = "~") Features: - Quick exchange only variable part of a long command line - Make variable part to be an entire column of data (i.e. file list) - Full control while processing every single item Hints: Paste column of data from anywhere. I.e. utilize the Block Select Mode to drag, select and copy columns (In KDE Konsole with Ctrl+Alt pressed, or only Ctrl pressed in GNOME Terminal respectively). Disadvantages: You can paste only one single variable in a row. If there are more space separated variables in a row only first one will be processed, but you can arrange your variables in a column instead. To transpose rows to columns or vice versa look at Linux manual pages for 'cut' and 'paste'. TODO: - add edit mode to vary command "c" and parameter "e" on the fly - add one edit mode more to handle every list item different - add y/n/a (=All) instead of only y(=default)/n to allowed answers Disclaimer: The code is not optimized, only the basic idea is presented here. It's up to you to shorten code or extend the functionality. Show Sample Output
This is sample output - yours may be different.
```
paste

./test/data1
./test/test0.sh
./test/test0.sh~

cp -ap ./test/data1 ~
y/n?
y
cp -ap ./test/test0.sh ~
y/n?
^C
```
-1

c="cp -a";e="~";echo -e "\npaste\n";i=0;k="1"; while [[ "$k" != "" ]]; do read -a k;r[i]=$k;((i++));done;i=0;while :;do t=${r[i]};[ "$t" == "" ] && break; g=$(echo $c ${r[i]} $e);echo -e $g "\ny/n?";read y;[ "$y" != "n" ] && eval $g;((i++));done

knoppix5 · 2011-12-04 12:45:44 4
MySQL: Find an instance of a populated table across numerous databases

Pulls all instances of table out of information schema, executes a SELECT COUNT(*) on each table/database instance, and then strips out any empty tables. Show Sample Output
This is sample output - yours may be different.
```
sandbox_cathdrwg_client1: 1
sandbox_cathdrwg_client2: 5
sandbox_cathdrwg_client3: 1
```
-1

TABLE_NAME=YYZ ; for DATABASE in $(echo "SELECT TABLE_SCHEMA FROM information_schema.tables WHERE TABLE_NAME='$TABLE_NAME'" | mysql -N) ; do echo -n "$DATABASE: " ; echo "SELECT COUNT(*) FROM $TABLE_NAME" | mysql $DATABASE -N ; done | fgrep -v ': 0'

MutinyEnigmatic · 2011-12-08 16:31:36 3
Print full LVM LV paths (for copy&paste)
This is sample output - yours may be different.
-1

vgdisplay -v 2>/dev/null | grep "^ LV Name" | while read A B LVDEV; do echo $LVDEV; done

f4m8 · 2011-12-09 14:57:50 4
convert myisam to innodb

Convert all Tables from MyISAM to InnoDB
This is sample output - yours may be different.
-1

for I in $(echo "show tables" | mysql -u<user> <database>`; do echo "ALTER TABLE $I ENGINE = INNODB"| mysql -u<user> <database>; done

int9h · 2011-12-16 14:51:10 15
Count the days until the next holiday in Argentina.
This is sample output - yours may be different.
-1

echo Faltan `curl http://www.elproximoferiado.com.ar/index.php?country=AR -silent | grep contador | cut -f2 -d">" | cut -f1 -d"<"` dias para el proximo feriado

guerremdq · 2012-01-16 23:58:05 3
Clear Cached Memory on Ubuntu

"That's it. Not much to see here. The first command writes any cache data that hasn't been written to the disk out to the disk. The second command tells the kernel to drop what's cached. Not much to it. This invalidates the write cache as well as the read cache, which is why we have the sync command first. Supposedly, it is possible to have some cached write data never make it to disk, so use it with caution, and NEVER do it on a production server. You could ... but why take the risk? As long as you are running a post 2.6.16 kernel,..." Source: http://ubuntuforums.org/showpost.php?p=3621283&postcount=1
This is sample output - yours may be different.
-1

sudo sync && sudo echo 3 | sudo tee /proc/sys/vm/drop_caches

StephenJudge · 2012-03-17 08:27:58 13
Add strikethrough to text

Uses Unicode combining characters to produce strikethrough effect. Since commandlinefu doesn't display Unicode properly, you will need to replace the dash in the code above with the Unicode long stroke overlay (U+0336).
This is sample output - yours may be different.
-1

echo text | sed "s/$.$/\1-/g"

ppaschka · 2012-03-23 17:18:54 3
Sum files of certain extension in given directory

Also shows files as they are found. Only works from a tty.
This is sample output - yours may be different.
-1

echo $(find <directory> -name '*.<extension>' -exec du -s {} \; | tee $(tty) | cut -f1 | tr '\n' '+') 0 | bc

ysangkok · 2012-09-17 22:46:50 11
send echo to socket network

you can use a pair of commands to test firewalls. 1st launch this command at destination machine ncat -l [-u] [port] | cat then use this command at source machine to test remote port echo foo | ncat [-u] [ip address] [port] First command will listen at specified port. It will listen TCP. If you use -u option will listen UDP. Second command will send "foo" through ncat and will reach defined IP and port. Show Sample Output
This is sample output - yours may be different.
```
"foo" if it's working
"Ncat: Connection refused." if it's not
```
-1

echo foo | ncat [ip address] [port]

dragonauta · 2012-10-26 10:53:47 6
Show git branches by date - useful for showing active branches

simple table
This is sample output - yours may be different.
-1

for k in `git branch -r|awk '{print $1}'`;do echo -e `git show --pretty=format:"%Cgreen%ci_%C(blue)%c r_%Cred%cn_%Creset" $k|head -n 1`$k;done|sort -r|awk -F"_" '{printf("%s %17s %-22s %s\n",$1,$2,$3,$4)}'

varon · 2012-10-29 12:38:24 6
Combo matrix

This is longer than others on here. The reason for this is I have combined two different matrix commands so it would work on all computers. I logged onto my server through a computer and it worked fine. I logged into my server through a mac and it looked $4!t so I have made one that works through both. Show Sample Output
This is sample output - yours may be different.
```
echo -e "\e[32m"; while :; do printf '%*c' $(($RANDOM % 30)) $(($RANDOM
% 2)); for i in {1..16}; do r=`echo -e "\x$(echo $(($(($RANDOM % 26)) + 
$(echo $([[ $(($RANDOM % 3)) == 1 ]] && echo -n 48 || echo -n $([[ 
$(($RANDOM % 3)) == 2 ]] && echo -n 97 || echo -n 65))))) 16 o p | 
dc)"`; if [[ $(($RANDOM % 5)) == 1 ]]; then if [[ $(($RANDOM % 4)) == 1  ]]; then v+="\e[1m $r   "; else v+="\e[2m $r   "; fi; else v+="     ";  fi; done; echo -e "$v"; v="";done
```
-1

echo -e "CHECK=SAMPLE" output --command_to_long

techie · 2013-04-03 08:46:47 10
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Which processes are listening on a specific port (e.g. port 80)

swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

Return threads count of a process

Source: http://superuser.com/questions/49408/how-do-i-monitor-or-view-the-thread-count-of-a-certain-process-on-aix

Get AWS temporary credentials ready to export based on a MFA virtual appliance

You might want to secure your AWS operations requiring to use a MFA token. But then to use API or tools, you need to pass credentials generated with a MFA token. This commands asks you for the MFA code and retrieves these credentials using AWS Cli. To print the exports, you can use: `awk '{ print "export AWS_ACCESS_KEY_ID=\"" $1 "\"\n" "export AWS_SECRET_ACCESS_KEY=\"" $2 "\"\n" "export AWS_SESSION_TOKEN=\"" $3 "\"" }'` You must adapt the command line to include: * $MFA_IDis ARN of the virtual MFA or serial number of the physical one * TTL for the credentials

Scan Subnet for IP and MAC addresses

tail -f a log file over ssh into growl

Changing the terminal title to the last shell command

Found the same command for zsh in http://www.davidpashley.com/articles/xterm-titles-with-bash.html - changed it a bit so that the behaviour is the same

Stream YouTube URL directly to mplayer.

Streams youtube video with v=ID directly into the mplayer. If exists, it uses the HD-quality stream. If you don't want to watch it in HD-quality, you can use the shorter form: $ID=52DnUo6wJto; mplayer -fs $(echo "http://youtube.com/get_video.php?&video_id=$ID$(wget -qO - 'http://youtube.com/watch?v='$ID | perl -ne 'print $1."&asv=" if /^.*(&t=.*?)&.*$/')")

copy/mkdir and automatically create parent directories

The --parents option will cause cp or mkdir to automatically create the parent directory structure. $mkdir --parents /one/two/three/dir will create /one, /one/two, and /one/two/three as needed before creating dir. cp will copy files with their full directory structure into the target directory with this option. Thanks to Peter Leung at: http://linuxcommando.blogspot.com/2007/11/use-of-parents-flag-in-mkdir-and-c.html which has good examples of usage.

Get AWS temporary credentials ready to export based on a MFA virtual appliance

Shows users and 'virtual users' on your a unix-type system

Shows a list of users that currently running processes are executing as. YMMV regarding ps and it's many variants. For example, you might need: $ ps -axgu | cut -f1 -d' ' | sort -u

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Commands using echo (1,545)

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